Water Quality: West Yellowstone, MT
4 water systems • 10,239 people served
Multiple Health ViolationsWater Quality Summary
West Yellowstone is served by 4 public water systems with a combined service population of 10,239 people, and has 383 EPA Safe Drinking Water Act violations on record. Critically, 8 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. West Yellowstone's violation count is 266% above the national average for Montana. Contaminants associated with violations include E. coli.
Contaminants Found
Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.
Common source: Fecal contamination from humans or animals entering the water supply
EPA limit: Zero (no E. coli permitted in drinking water)
Water Systems Serving West Yellowstone
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| WEST YELLOWSTONE TOWN OF | MT0003136 | Groundwater | 9,899 | 54 |
| HEBGEN LAKE ESTATES CO WATER SEWER DISTR | MT0001983 | Groundwater | 230 | 10 |
| YELLOWSTONE HOLIDAY WTR AND SEW DISTRICT | MT0001326 | Groundwater | 85 | 3 |
| FISHERMANS VILLAGE SUBDIVISION | MT0004722 | Groundwater | 25 | 316 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Montana
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.